Currently Being ModeratedFeb 18, 2013 1:01 PM (in response to dawie-erasmus)
For the longer life cycle most people want, it is best to charge a Lithium-technology battery when the charge drops to about 50%...time to charge will vary for line-power, computer USB port, etc. Should only take a few hours to fully recharge.
Currently Being ModeratedFeb 18, 2013 1:09 PM (in response to KarenSelena)
Hi Karen, despite the Apple recommendations, if you read the results of an independent test group called the Battery University you will see they found that deep discharging to shutoff significantly shortens a Lithium-Ion battery's life. Best comptromise for charge/use/longevity looks to ba discharging to 50%.